Suspension device for vehicle

Abstract

A vehicle suspension device of the present application is provided to a vehicle body of a vehicle, and is a suspension device for supporting an axle, and includes a leaf spring, a locking member for locking one end of the leaf spring, a holding member for holding the other end of the leaf spring, and a support member for supporting the holding member, which is swingably attached to the vehicle body. The holding member includes a pair of pressing members for sandwiching and holding the other end of the leaf spring, and a connection portion for connecting the pair of pressing members.

Description

Technical Field

[0001] This invention relates to a suspension system for vehicles. Background Technology

[0002] Previously, a suspension system was known, which, when installed in vehicles, had a damping function to prevent vibrations caused by uneven road surfaces from being transmitted to the vehicle body via the wheels, thereby improving the vehicle's ride comfort and handling stability. Among suspension systems, leaf spring suspension systems are constructed using leaf springs (for example, see Patent Document 1).

[0003] The leaf spring described in Patent Document 1 has one end fixed to the vehicle body and the other end held in a sliding position by a slider. The leaf spring is subjected to a load from an axle or the like at its central portion in the longitudinal direction and deforms due to the load.

[0004] Patent Document 1: Japanese Patent Application Publication No. 61-169307. Summary of the Invention

[0005] However, when the end of the leaf spring is held by a slider as in Patent Document 1, wear caused by friction between the slider and the leaf spring can lead to reduced durability, or noise can be generated due to friction during sliding.

[0006] The present invention was made in view of the above, and its object is to provide a vehicle suspension device that can suppress the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining member.

[0007] To solve the above problems and achieve the objective, the present invention provides a vehicle suspension device disposed on the vehicle body, which is a suspension device for supporting the axle, comprising: a leaf spring; a locking member for locking one end of the leaf spring; a retaining member for retaining the other end of the leaf spring; and a supporting member mounted on the vehicle body in a swingable manner for supporting the retaining member, the retaining member having: a pair of pressing members for clamping and retaining the other end of the leaf spring; and a connecting portion for connecting the pair of pressing members.

[0008] Furthermore, in the vehicle suspension device of the present invention, the retaining member is supported on the supporting member in a swing-free manner, as described above.

[0009] Furthermore, the vehicle suspension device of the present invention, in the above invention, the pressing member has: a shaft portion supported on the connecting portion; and an outer peripheral portion disposed on the outer periphery of the shaft portion, which is rotatable relative to the shaft portion.

[0010] Furthermore, the vehicle suspension device of the present invention is such that, in the above invention, the thickness of the leaf spring gradually increases towards the center portion in the length direction, where the length direction is from one end to the other.

[0011] Furthermore, in the vehicle suspension device of the present invention, the pressing member has a multi-layer structure comprising an elastic material, as described above.

[0012] According to the present invention, the following effects are achieved: the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining component are suppressed. Attached Figure Description

[0013] Figure 1 This is a diagram showing the structure of a portion of a vehicle that includes a suspension system according to an embodiment of the present invention.

[0014] Figure 2 This is a diagram illustrating the structure of the leaf spring in a suspension device according to one embodiment of the present invention.

[0015] Figure 3 This is a diagram showing the structure of a part of a vehicle that includes the suspension device of Modification 1 of the present invention.

[0016] Figure 4 This is a diagram showing the structure of a part of a vehicle that includes the suspension device of Modification 2 of the present invention.

[0017] Figure 5 This is a diagram showing the structure of the pressing component of the suspension device in Modification 3 of the present invention.

[0018] Figure 6 This is a diagram showing the structure of a part of a vehicle that includes the suspension device of Modification 4 of the present invention.

[0019] Figure 7 This is a diagram showing the structure of the pressing component of the suspension device in Modification 5 of the present invention. Detailed Implementation

[0020] Hereinafter, the embodiments for carrying out the present invention (hereinafter referred to as "implementations") will be described with reference to the accompanying drawings. Furthermore, the drawings are schematic diagrams, and the relationship between the thickness and width of each part, the ratio of the thickness of each part, etc., may differ from the actual situation. The drawings may also sometimes include parts with different dimensional relationships or ratios.

[0021] Implementation Figure 1 This is a diagram showing the structure of a portion of a vehicle that includes a suspension system according to an embodiment of the present invention. Figure 1The suspension device 1 shown is mounted on the vehicle body and supports the axle 100, which in turn supports the wheel 101. Additionally, in Figure 1 In this configuration, the left side is designated as the front of the vehicle, and the right side as the rear. The suspension device 1 includes: a leaf spring 2; a locking member 3 for locking one end of the leaf spring 2; a retaining member 4 for retaining the other end of the leaf spring 2 so that it can move freely forward and backward; and a support member 5 for supporting the retaining member 4 so that it can swing freely.

[0022] The locking member 3 and the retaining member 4 are mounted on a frame 110 fixed to the vehicle body. Specifically, the locking member 3 is provided at the front mounting portion 120, which is fixed to the frame 110. The retaining member 4 is provided at the rear mounting portion 130 via the supporting member 5, which is fixed to the frame 110. The front mounting portion 120 and the rear mounting portion 130 are fixed to the frame 110 by fasteners such as screws. Furthermore, the locking member 3 is mounted to the front mounting portion 120 by welding or the like. Additionally, the supporting member 5 is mounted to the rear mounting portion 130 in a pivotable manner. Alternatively, the locking member 3 and the supporting member 5 may be integrally formed with respect to the front mounting portion 120 and the rear mounting portion 130, respectively.

[0023] Insertion holes (not shown) are formed at the center of the leaf spring 2 along its length and at the center of the washer 140. The leaf spring 2 and the washer 140 form a leaf spring assembly, which is fixed by tightening the center bolts 140a and nuts 140b inserted into the insertion holes. The leaf spring assembly is fixed to the housing 160 by U-bolts 150.

[0024] The housing 160 is fixed to the axle 100.

[0025] Figure 2 This diagram illustrates the structure of a leaf spring in a suspension device according to an embodiment of the present invention. The leaf spring 2 includes: a main body 20 formed by bending one end of a strip-shaped member; a hook-shaped first end portion 21 disposed at one end of the main body 20; and a second end portion 22 disposed at the other end of the main body 20. An axle 100 is disposed below the main body 20 at its central portion along its length. The first end portion 21 is locked by winding around a locking member 3. Here, "locking" simply means preventing the first end portion 21 from detaching from the locking member 3, regardless of whether the first end portion 21 rotates relative to the locking member 3. The leaf spring 2 is formed using a metal material (e.g., spring steel), a resin material, or fiber-reinforced plastic (FRP).

[0026] The retaining member 4 has: a pair of pressing members (a first pressing member 41 and a second pressing member 42), and a connecting part 43 that connects the pressing members to each other.

[0027] The first pressing component 41 and the second pressing component 42 are opposite to each other, and the end of the leaf spring 2 passes between them.

[0028] The first pressing member 41 has a first shaft portion 41a connected to the rear mounting portion 130 via the support member 5, and a first outer peripheral portion 41b disposed around the first shaft portion 41a.

[0029] The second pressing member 42 has a second shaft portion 42a connected to the rear mounting portion 130 via the support member 5, and a second outer peripheral portion 42b disposed around the second shaft portion 42a.

[0030] The first shaft portion 41a and the second shaft portion 42a are formed, for example, of a metal material. Furthermore, the first outer peripheral portion 41b and the second outer peripheral portion 42b are formed, for example, of a metal material, a resin material, or rubber. By using an elastic material such as rubber or resin to form the outer peripheral portion, a damping effect can be obtained. Furthermore, the damping effect can be adjusted by adjusting the distance between the first shaft portion 41a and the second shaft portion 42a.

[0031] The distance (gap) between the first pressing member 41 and the second pressing member 42 is, for example, less than or equal to the thickness of the leaf spring 2. Therefore, with the leaf spring 2 positioned between the pressing members, the first pressing member 41 and the second pressing member 42 respectively contact the leaf spring 2, gripping it by clamping and pressing. Furthermore, the term "equal" here includes manufacturing tolerances, etc.

[0032] Connecting part 43 connects the first shaft part 41a and the second shaft part 42a. Connecting part 43 is located along the central axis of the shaft part (here, with). Figure 2 The first shaft portion 41a and the second shaft portion 42a are connected on at least one side (in a direction orthogonal to the plane of the paper). In this embodiment, the two ends of the connecting portion 43 are fixed to the first shaft portion 41a and the second shaft portion 42a, respectively.

[0033] The support member 5 has a support portion 52 that is swayable about a central axis 51. The central axis 51 is supported on the vehicle body. In this embodiment, the central axis 51 extends from the rear mounting portion 130. Therefore, the retaining member 4 is swayable about the central axis 51 of the rear mounting portion 130. In this embodiment, the support member 5 is configured to be fixed in any position.

[0034] One end of the support portion 52 is connected to the central shaft 51 fixed to the vehicle body (here, the rear mounting portion 130), and the other end is connected to the first shaft portion 41a of the first pressing member 41. The support portion 52 is connected to the side of the first shaft portion 41a opposite to the side connected to the connecting portion 43. Alternatively, the support portion 52 may be configured to be connected to the side of the first shaft portion 41a connected to the connecting portion 43.

[0035] The leaf spring 2 deforms according to the vibration of the axle 100 caused by uneven road surfaces, etc. (refer to...) Figure 2 (The dotted line indicates this). At this time, the support member 5 swings according to the change in load applied by the leaf spring 2 due to the deformation of the leaf spring 2, thereby changing the position of the retaining member 4. The second end 22 is clamped by the first pressing member 41 and the second pressing member 42, thereby maintaining the state held by the retaining member 4. For example, the support member 5 swings to a position where the line segment connecting the first pressing member 41 and the second pressing member 42 is perpendicular to the length direction of the leaf spring 2 at the part in contact with the leaf spring 2. By swinging the support member 5, the length between the locking member 3 of the leaf spring 2 and the retaining member 4, that is, the effective span of the leaf spring 2, can be adjusted, thereby maintaining the load characteristics of the leaf spring 2, or reducing the load that may increase due to the deformation of the leaf spring 2.

[0036] In the embodiments of the present invention described above, in the leaf spring 2 that deforms according to the vibration of the axle 100, one end is locked to the vehicle body (here, the frame 110), and the other end is held by the first pressing member 41 and the second pressing member 42, thereby causing the support member 5 supporting the retaining member 4 to swing according to the deformation of the leaf spring 2. According to this embodiment, by swinging the support member 5, the generation of friction between the leaf spring 2 and the retaining member 4 is suppressed, thereby suppressing the reduction in durability and the generation of noise caused by the friction between the leaf spring and the retaining member.

[0037] Here, when the end of the leaf spring 2 is held in place by a sliding plate, if the side of the leaf spring 2 further forward than the axle breaks, the main body of the leaf spring 2 will rotate around the rear end connection, causing the axle to move closer to the vehicle body, resulting in a significant decrease in the vehicle's ground clearance. In contrast, as shown in this embodiment, when the leaf spring 2 is clamped by a pressing member on the side further rear than the central axis 51, even if the front side of the leaf spring 2 breaks, the rear side will generate a repulsive force due to the clamping, thus suppressing a significant decrease in the vehicle's ground clearance.

[0038] Furthermore, according to this embodiment, by using a pressing member to hold the leaf spring 2, compared with the conventional leaf spring which is made by stacking a main spring and multiple auxiliary springs, the leaf spring 2 can have non-linear characteristics with a simple structure.

[0039] Variation Example 1 Next, refer to Figure 3 A modified example 1 of the embodiments of the present invention will be described. Figure 3 This is a diagram showing the structure of a portion of a vehicle incorporating the suspension system of Modification 1 of the present invention. The suspension system of Modification 1 includes a support member 5A instead of the support member 5, and the retaining member 4 is capable of swinging relative to the support member 5A. Other constituent elements are the same structure as in the embodiment, and therefore descriptions are omitted.

[0040] The support member 5A has a support portion 52 capable of swinging about a central axis 51 and a rotating shaft 53. The rotating shaft 53 is provided at the end of the support member 5A opposite to the side where the central axis 51 is located. In this modified example 1, the retaining member 4 is connected to the rotating shaft 53 in a swingable manner. Therefore, the retaining member 4 can swing about the rotating shaft 53 of the support member 5A.

[0041] In this modified example 1, the support member 5A oscillates about the central axis 51, while the holding member 4 oscillates about the rotation axis 53, according to the change in load applied from the leaf spring 2 due to its deformation. For example, the holding member 4 and the support member 5A are oscillated to a position where the first pressing member 41 and the second pressing member 42 are positioned to apply a uniform load to the leaf spring 2 (for example, the position where the line segment connecting the first pressing member 41 and the second pressing member 42 is perpendicular to the length direction of the leaf spring 2 at the portion in contact with it). Through the oscillation of the support member 5A and the support member 4, the length between the locking member 3 and the holding member 4 of the leaf spring 2, i.e., the effective span of the leaf spring 2, is adjusted, thereby maintaining the load characteristics of the leaf spring 2, or reducing the load that may increase due to the deformation of the leaf spring 2.

[0042] Similar to the embodiment described above, in this modified example 1, the leaf spring 2, which deforms according to the vibration of the axle 100, is secured at one end to the vehicle body (here, the frame 110), while the other end is held by the first pressing member 41 and the second pressing member 42. This causes the retaining member 4 and the support member 5A supporting the retaining member 4 to swing according to the deformation of the leaf spring 2. According to this modified example 1, the swinging of the retaining member 4 and the support member 5A suppresses the generation of friction between the leaf spring 2 and the retaining member 4, thereby suppressing the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining member.

[0043] Variation Example 2 Next, refer to Figure 4 A modified example 2 of the embodiments of the present invention will be described. Figure 4This is a diagram showing the structure of a portion of a vehicle incorporating the suspension system of Modification 2 of the present invention. The suspension system of Modification 2 includes a retaining member 4A instead of a retaining member 4. Other constituent elements are the same structure as in the embodiment, and therefore descriptions are omitted.

[0044] The retaining member 4A has: a first pressing member 41 and a second pressing member 42, and a connecting portion 43 connecting the first pressing member 41 and the second pressing member 42.

[0045] In this modified example 2, in the first pressing member 41, the first outer peripheral portion 41b (see Figure 2 It can rotate freely relative to the first shaft portion 41a. The first outer peripheral portion 41b rotates about the central axis N1 of the first shaft portion 41a relative to the first shaft portion 41a.

[0046] Additionally, in the second pressing member 42, the second outer peripheral portion 42b (see...) Figure 2 It can rotate freely relative to the second shaft portion 42a. The second outer peripheral portion 42b is connected to the second shaft portion 42a, for example, via a bearing, and rotates about the central axis N2 of the second shaft portion 42a.

[0047] In addition, the central shafts N1 and N2 extend along the width direction of the leaf spring 2 (the direction orthogonal to the paper).

[0048] The distance (gap) between the first pressing member 41 and the second pressing member 42 is, for example, equal to the thickness of the leaf spring 2. Therefore, with the leaf spring 2 positioned between the pressing members, the first pressing member 41 and the second pressing member 42 respectively contact the leaf spring 2, thereby gripping the leaf spring 2.

[0049] In this modified example 2, the support member 5 swings about the central axis 51 according to the change in load applied from the leaf spring 2 due to its deformation. At this time, the retaining member 4A is connected to the support member 5, but the retaining member 4A can also swing about the rotation axis 53 (see...). Figure 3 The spring is connected to the support member 5 in a swinging manner. By swinging the support member 5 and the retaining member 4, the length between the locking member 3 and the retaining member 4A of the leaf spring 2, that is, the effective span of the leaf spring 2, can be adjusted, so as to maintain the load characteristics of the leaf spring 2, or reduce the load that may increase due to the deformation of the leaf spring 2.

[0050] Similar to the previous embodiment, in this modified example 2 described above, the leaf spring 2, which deforms according to the vibration of the axle 100, is secured to the vehicle body (here, the frame 110) at one end, while the other end is held by the first pressing member 41 and the second pressing member 42. This causes the support member 5 of the supporting and retaining member 4A to swing according to the deformation of the leaf spring 2. According to this modified example 2, the swinging of the support member 5 suppresses the generation of friction between the leaf spring 2 and the retaining member 4A, thereby suppressing the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining member.

[0051] Furthermore, according to Modification 2, the first outer peripheral portion 41b and the second outer peripheral portion 42b rotate according to the displacement of the second end portion 22, thereby suppressing the generation of friction with the second end portion 22.

[0052] Furthermore, in Modification 2, it is also possible to make only one pressing component able to rotate, while the other pressing component cannot rotate.

[0053] Variation Example 3 Next, refer to Figure 5 A variation of the embodiment of the present invention, namely Example 3, will be described. Figure 5 This diagram illustrates the structure of the rollers in the suspension device of Modified Example 3 of the present invention. The suspension device of Modified Example 3 includes a retaining member 4B instead of a retaining member 4. Furthermore, the first pressing member 41 and the second pressing member 42 of the retaining member 4B are mounted to the frame 110 in a manner that allows relative movement. Other constituent elements have the same structure as in the embodiment, and therefore descriptions are omitted. Furthermore, the same reference numerals are used to denote the same constituent elements.

[0054] The retaining member 4B includes: two pressing members (a first pressing member 41 and a second pressing member 42); a first spring member 44 that connects the ends of the two pressing members on one axial side to each other; and a second spring member 45 that connects the ends of the two pressing members on the other axial side to each other.

[0055] For example, the first spring component 44 is telescopically connected to the shaft of the first shaft portion 41a (shaft N1: see Figure 4 One end of the shaft in the direction of the second shaft 42a is connected to the shaft (shaft N2: see...) Figure 4 One end of the direction.

[0056] The second spring component 45 extends and retracts freely to connect the other end of the first shaft portion 41a in the N1 direction with the other end of the second shaft portion 42a in the N2 direction.

[0057] In this modified example 3, the first pressing member 41 and the second pressing member 42 are subjected to pressure in a direction of mutual approach by the spring member, which serves as a force-applying member. For example, in the natural state where no load other than gravity is applied to the spring member, the distance (gap) between the pressing members is less than or equal to the thickness of the leaf spring 2. Therefore, with the leaf spring 2 positioned between the pressing members, the first pressing member 41 and the second pressing member 42 respectively contact the leaf spring 2, thereby gripping the leaf spring 2.

[0058] Similar to the previous embodiment, in this modified example 3 described above, the leaf spring 2, which deforms according to the vibration of the axle 100, is secured to the vehicle body (here, the frame 110) at one end, while the other end is held by the first pressing member 41 and the second pressing member 42. This causes the support member 5 of the retaining member 4B to swing according to the deformation of the leaf spring 2. According to this modified example 3, the swinging of the support member 5 suppresses the generation of friction between the leaf spring 2 and the retaining member 4B, thereby suppressing the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining member.

[0059] Furthermore, according to Modified Example 3, the distance between the pressing parts changes with the displacement of the leaf spring 2 by means of the spring component. Therefore, it is possible to suppress the leaf spring 2 from being subjected to excessive load from the pressing parts and prevent the smooth deformation behavior of the leaf spring from being hindered.

[0060] Furthermore, although the example of using a spring component as a component to adjust the interval of the pressing components was described in Modification 3, it is not limited to this. For example, a structure in which the interval between the pressing components is electronically controlled by an actuator can also be adopted.

[0061] Furthermore, in this embodiment, the thickness of the outer periphery relative to the rotation axis is made uniform, thereby enabling the leaf spring to experience uniform resistance from the pressing component, thus improving vibration resistance and durability.

[0062] Variation Example 4 Next, refer to Figure 6 A variation of the present invention, namely Example 4, will be described. Figure 6 This diagram illustrates the structure of a portion of a vehicle incorporating the suspension system of Modification 4 of the present invention. In Modification 4, the suspension system replaces leaf spring 2 with leaf spring 2A. Other constituent elements are the same as in the embodiment, and therefore descriptions are omitted. Furthermore, the same reference numerals are used to denote the same constituent elements.

[0063] In the length direction of the main body portion 20 from the first end 21 toward the second end 22, the thickness of the leaf spring 2A increases with the central portion in the length direction toward the main body portion 20.

[0064] Similar to the embodiment described above, in this modified example 4, the leaf spring 2, which deforms according to the vibration of the axle 100, is secured to the vehicle body (here, the frame 110) at one end, while the other end is held by the first pressing member 41 and the second pressing member 42. This causes the support member 5 of the supporting and retaining member 4 to swing according to the deformation of the leaf spring 2A. According to this modified example 4, the swinging of the support member 5 suppresses the generation of friction between the leaf spring 2A and the retaining member 4, thereby suppressing the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining member.

[0065] Furthermore, in this modified example 4, the thickness of the leaf spring 2A is configured to increase as it moves toward the center in the length direction, thus enabling stress uniformity.

[0066] Variation Example 5 Next, refer to Figure 7 A variation of the present invention, namely Example 5, will be described. Figure 7 This diagram illustrates the structure of the pressing member of the suspension device in Modification 5 of the present invention. The suspension device in Modification 5 includes a pressing member 46 in place of the first pressing member 41 and / or the second pressing member 42 of the retaining member 4. Other constituent elements are the same as in the embodiment, and therefore descriptions are omitted.

[0067] The pressing member 46 has a shaft portion 46a connected to the rear mounting portion 130 via the support member 5, and an outer peripheral portion 46b disposed around the shaft portion 46a.

[0068] The outer peripheral portion 46b has a first portion 461 and a second portion 462. The first portion 461 is a hollow cylinder through which the shaft portion 46a is inserted, and the second portion 462 covers the outer peripheral surface of the first portion 461.

[0069] The first part 461 is formed, for example, using an elastic material such as resin or rubber, or an elastic component such as a mesh spring. The second part 462 is formed, for example, using a material such as metal, which has higher stiffness than the first part 461 and lower stiffness than the leaf spring 2. Thus, the function of the present invention can be achieved and the durability of the leaf spring can be improved.

[0070] Here, the outer peripheral portion 46b is formed as a multi-layered structure containing elastic material. Therefore, the pressing member 46 is formed as a multi-layered structure containing elastic material. Furthermore, the multi-layered structure is not limited to, for example... Figure 7 The double-layer structure shown can be made of both metallic and elastic materials, or it can be a structure with three or more layers, including a layer made of elastic material.

[0071] Similar to the previous embodiment, in this modified example 5 described above, the leaf spring 2, which deforms according to the vibration of the axle 100, is secured to the vehicle body (here, the frame 110) at one end, while the other end is held by two pressing members 46. This causes the support member 5, which supports the retaining member, to swing according to the deformation of the leaf spring 2. According to this modified example 5, the swinging of the support member 5 suppresses the generation of friction between the leaf spring 2 and the retaining member, thereby suppressing the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining member.

[0072] Furthermore, according to Modification 5, the outer peripheral portion 46b is configured to have: a first elastic portion 461 and a second portion 462 with a stiffness higher than the first portion 461. Therefore, by absorbing the impact from the leaf spring 2 through the first portion 461, damage to the pressing component or the leaf spring 2 can be suppressed. In addition, the first elastic portion 461 can absorb the impact during vehicle travel, thereby improving ride comfort, while reducing rolling resistance to achieve smooth operation.

[0073] Furthermore, in Modification 5, one pressing member can be constituted by pressing member 46, and another pressing member can be constituted by first pressing member 41 or second pressing member 42. For example, by making pressing member 46 an upper pressing member relative to the vehicle body, the ride comfort can be improved because there is an elastic member (first part 461) between the leaf spring 2 and the load line toward the vehicle body. Conversely, by making pressing member 46 a lower pressing member relative to the vehicle body, the durability of leaf spring 2 or pressing member can be improved.

[0074] The foregoing has described the methods for implementing the present invention, but the present invention should not be limited to the above embodiments. Although the structure connecting the axle 100 and the leaf spring 2 via the U-bolt 150 has been described in the above embodiments and modifications, a structure without the U-bolt, for example, where the axle 100 and the leaf spring 2 are directly connected, may also be used. Furthermore, although the structure in the above embodiments and modifications uses a position where the leaf spring 2 is positioned higher than the axle 100, a structure where the leaf spring 2 is positioned lower than the axle 100 may also be used.

[0075] In addition, in the embodiment, an example of the support member 5 being able to be fixed in any position was described, but it can also be set to a state that swings according to the load from the leaf spring 2.

[0076] Alternatively, in the embodiment, the following structure may be adopted: a rotating platform supporting the first pressing member 41 and the second pressing member 42 is provided in the rear mounting part 130, and the first pressing member 41 and the second pressing member 42 rotate (revolve) around the rotation axis of the rotating platform.

[0077] Alternatively, in the implementation or modification, a protrusion may be provided on the side of the pressing member opposite to the vehicle body side to prevent the leaf spring 2 from falling off the retaining member.

[0078] Alternatively, in the implementation, the following structure can be adopted: a retaining member 4 is provided instead of a locking member 3, and the two ends of the leaf spring 2 are gripped by a pressing member.

[0079] In addition, in the embodiments and variations, the surface of the pressing member that contacts the leaf spring 2 can be made into a curved surface, or a recess can be formed on the surface that contacts the leaf spring 2.

[0080] Thus, the present invention may include various embodiments not described herein, and various design changes may be made without departing from the technical concept defined by the scope of the claims.

[0081] Industrial applicability As explained above, the vehicle suspension device of the present invention is suitable for suppressing the reduction in durability and the generation of noise caused by friction between the leaf spring and the retaining member.

[0082] Symbol explanation: 1. Suspension system 2 leaf springs 3. Locking components 4. 4A Retaining Component 5 Support components 41 First pressing component 42 Second pressing component 46 Pressing component 41a First shaft section 41b First peripheral part 42a Second shaft section 42b Second peripheral region 43 Connecting part 44 First Spring Component 45 Second Spring Component 46a Shaft 46b Peripheral part 100 axles 101 Wheels 110 Frame 120 Front Installation Section 130 Rear Installation Department 140 Washer 150 U-bolt 160 housing 461 Part One 462 Part Two.

Claims

1. A vehicle suspension device, disposed on the vehicle body, for supporting axles, characterized in that it comprises: Leaf spring; A locking component that locks one end of the leaf spring; A retaining component for retaining the other end of the leaf spring; and A support component, which is mounted to the vehicle body in a swingable manner, is used to support the retaining component. The retaining component has: A pair of pressing components that clamp and hold the other end of the leaf spring; and A connecting part that connects the pair of pressing parts.

2. The vehicle suspension device according to claim 1, characterized in that, The retaining component is supported on the supporting component in a swing-free manner.

3. The vehicle suspension device according to claim 1, characterized in that, The pressing component has: A shaft portion, which is supported by the connecting portion; and The outer peripheral portion is located on the outer periphery of the shaft portion and is rotatable relative to the shaft portion.

4. The vehicle suspension device according to claim 1, characterized in that, The thickness of the leaf spring gradually increases towards the center of its length, which is the direction from one end to the other.

5. The vehicle suspension device according to claim 3, characterized in that, The pressing component has a multi-layered structure containing elastic material.

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